'''Abu ʾl-Qasim Ferdowsi Tusi''' (''c.'' 940–1020), or '''Ferdowsi'''
(also transliterated as '''Firdawsi''', '''Firdusi''', '''Firdosi''', '''Firdausi''') was a Persian people|Persian
poet and the author of ''Shahnameh
'' ("Book of Kings"), which is the world's longest epic poetry|epic poem
created by a single poet, and the national epic
and the Greater Iran
. Having drafted the ''Shahnameh'' under patronage of the Samanid Empire|Samanid
and the Ghaznavids|Ghaznavid
courts of Iran, Ferdowsi is celebrated as the most influential figure in Persian literature
and one of the greatest in the history of literature
. He is widely regarded as the greatest poet in the Persian language
. He was called "The Lord of the Word" and "The Savior of Persian Language".